Remove our local modifications to sqlite's os_unix.c now that

third_party/sqlite/README.chromium

Index: third_party/sqlite/README.chromium
diff --git a/third_party/sqlite/README.chromium b/third_party/sqlite/README.chromium
index 45d0a8d0c95eb4175327cb6434759b0607870072..2ac741595e728782dfad271f1ec1eeddf9f56003 100644
--- a/third_party/sqlite/README.chromium
+++ b/third_party/sqlite/README.chromium
@@ -155,18 +155,3 @@ Changes from Chrome:
  - Added a new function chromium_sqlite3_initialize_win_sqlite3_file()
    at the end of os_win.c. It allows the Windows-specific Chromium VFS
    to reuse most of the win32 SQLite VFS.
- - Added a new function
-   chromium_sqlite3_initialize_unix_sqlite3_file() and made
-   fillInUnixFile() non-static in os_unix.c. It allows the
-   Linux-specific Chromium VFS to reuse most of the unix SQLite VFS.
- - Exposed three functions that deal with unused file descriptors in
-   os_unix.c, to allow Chromium's Posix VFS implementation in
-   WebKit/WebCore/platform/sql/chromium/SQLiteFileSystemChromiumPosix.cpp
-   to correctly implement the "unused file descriptors" logic in the
-   xDlOpen() method. The new functions are
-   chromium_sqlite3_get_reusable_file_handle(),
-   chromium_sqlite3_update_reusable_file_handle() and
-   chromium_sqlite3_destroy_reusable_file_handle(). Also, added the
-   chromium_sqlite3_fill_in_unix_sqlite3_file() function that calls
-   fillInUnixFile(), which will be made static again as soon as a
-   WebKit patch using the new function lands.